The effect of exercise intensity on the post-exercise esophageal temperature response |
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Authors: | Glen P Kenny Peter C Niedre |
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Institution: | (1) University of Ottawa, Faculty of Health Sciences, School of Human Kinetics, Human Performance and Environmental Medicine Research Laboratory, 125 University, Montpetit Hall, Room 376, Ottawa, Ontario, Canada, K1N 6N5, |
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Abstract: | On 2 separate days, nine volunteers aged 23.8 (2.0) years performed 15-min bouts of treadmill running in a temperature-controlled
chamber at 29°C at a power output that elicited either 70% (moderate) or 93% (intense) of maximum oxygen consumption. Exercise
was followed by a 45-min recovery period. End-exercise esophageal temperature (T
es) was elevated by 0.97°C and 2.17°C above baseline for the moderate and intense exercise trials, respectively. Post-exercise
T
es achieved a sustained elevated value of 0.38°C and 0.79°C within 15 min of exercise cessation. Systolic blood pressure (SBP)
for both exercise trials became hypotensive for the full recovery period, with the magnitude of the reduction being greater
for the intense exercise (P<0.05). Diastolic blood pressure (DBP) was unaffected by exercise intensity and values were lower than baseline between 15 min
and 30 min post-exercise (P<0.05). Mean arterial pressure (MAP) was reduced from baseline for both exercise trials, with intense exercise showing a greater
decrement (P<0.05). It was shown that the increase in the post-exercise hypotensive response, induced by exercise of increasing intensity,
was paralleled by an increase in the magnitude of the post-exercise elevation in T
es (i.e., a difference of 0.41°C between conditions).
Electronic Publication |
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Keywords: | Temperature regulation Esophageal temperature Exercise Blood pressure |
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